Improvement in dies tor forging vise-boxes



tlntd tatw -CHRISTIAN KONOLD, 0F IITTSBURG, PENNSYLVANIA.

Letterslatent No. 104,165, dated func 14, 1870.

IMPROVEMENT IN DIES FOR FORG-ING- VISE-BOXES.

The Schedule referred to in these Letters Patent and making part of the same I, CHRISTIAN KoNoLD, of Pittsburg, in the county 'of Allegheny and State of Pennsylvania, have invented certain Improvements in Dies for Forging and Swagmg V1se-Ioxes, of which the following is a specieation.

Natnrc and Objects o f'thc Invention.

` bottom dies.

Figure 3, end view of one of the dies. Figure 4 represents a pipe orrse-box.

General Description.

These dies are to be made of steel, cast iron, or other hard metal, the upper die A being an exact counterpart of the lower one, B, each provided with a longitudinal tongue, S, to secure them, the one in an anvil, and the other in the face of a drop or hammer, and so arranged that when in operation the va. rions grooves in each will correspond, and will work ou a line, as shown in fig. 2. These grooves and depressions are intended to produce on a piece of hot iron, placed between them, the several diameters, shoulders, and shapes usually given to the exterior of' a pipe or vise-box, fully represented by fig. 4, which vise-box, when finished, consists ot a short strong metallic tube, having a screw out therein corresponding in shape and size to a male screw operating therewith,

for opening and closing the. vise.

To make a vise-box, I take a short thick piece of flat bar iron, and bring its edges together in such a manner as to form a stout tube, a little less in length than the intended box. This tube is then brought to a welding heat, placed 011 a mandrel, and submitted to the action of a pair ot' dies, constructed as shown and described, which operation welds the tube, and gives it the requisite shape and length, by varying its external diameter, making that part intended to pass through the vise-stock not only less in size, but of an elliptical shape, which shape answers the purpose of a feather, and prevents its rotation when placed in the vise. llhe mandrel is then withdrawn, and a screw cut through the entire tube, after which' the knob or cascabel is added to stop the tube at the large end, and give finishto the box.

Claim..

I claim the series of dies having the various grooves and depressions, therein shown and described, for the purpose of forging and swaging vise-boxes, substantially as set forth. v

f CHRISTIAN KONOLD.

Witnesses: Y

J osIAH W. Enns, J. B. WHALEY. 

